03/10/2026
The Life of the Amazon Oxbow Lake
Deep in the Amazon rainforest, a lake may actually be a piece of an ancient river.
When a meandering river changes course, it can leave a curved section of its old channel behind. Over time, the connection closes and an oxbow lake is born.
But the story doesn't end there.
With every rise and fall of the Amazon's waters, the lake changes.
- Fish enter the flooded forest to feed on fruits, seeds and insects.
- Birds gather along the water's edge.
- Caimans wait silently in the shadows.
- Trees and palms provide food and shelter.
- Monkeys move through the forest above the water.
During the flood season, the forest and lake can become one enormous ecosystem. When the water falls, fish and wildlife become concentrated in the remaining channels and lagoons.
For Indigenous peoples, these waters are more than habitat. They can be sources of food, transportation, knowledge, stories and cultural memory—part of a living landscape understood through generations of experience.
An oxbow lake is therefore much more than a lake.
It is a river's memory, a forest's pantry, a nursery for wildlife, and a window into the ancient relationship between people and the Amazon.
Yasuní Wildlife — Welcome to the diversity of life.